KEY POINTS:
National has a 10 percentage point lead over Labour in the latest poll.
The TV One-Colmar Brunton poll has National on 49 per cent support and Labour on 39 per cent, both up slightly from the previous poll. The Greens are on 6 per cent, New Zealand First and Maori Party on 2 per cent with Act and United Future on 1 per cent.
Prime Minister Helen Clark's support as preferred Prime Minister is up 5 points to 37 per cent and National leader John Key is steady on 29 per cent.
The poll of 1000 people has a margin of error of 3.1 per cent.
